154855617947 has 2 divisors, whose sum is σ = 154855617948. Its totient is φ = 154855617946.

The previous prime is 154855617941. The next prime is 154855618003. The reversal of 154855617947 is 749716558451.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 154855617947 - 2¹⁸ = 154855355803 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 154855617947.

It is not a weakly prime, because it can be changed into another prime (154855617941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77427808973 + 77427808974.

It is an arithmetic number, because the mean of its divisors is an integer number (77427808974).

Almost surely, 2^154855617947 is an apocalyptic number.

154855617947 is a deficient number, since it is larger than the sum of its proper divisors (1).

154855617947 is an equidigital number, since it uses as much as digits as its factorization.

154855617947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336000, while the sum is 62.

The spelling of 154855617947 in words is "one hundred fifty-four billion, eight hundred fifty-five million, six hundred seventeen thousand, nine hundred forty-seven".